Characterization of YBCO bulk superconductors for 100 kW h flywheel

K. Matsunaga, N. Yamachi, M. Tomita, Masato Murakami, N. Koshizuka

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

We characterized YBCO bulk superconductors that will be installed in the radial type superconducting magnetic bearing module for a 100 kWh class flywheel system. The inner-stator is a cylinder with the outer diameter of 208 mm, the inner diameter of 180 mm, and the height of 100 mm. At present the stator is planned to consist of 24 and 16 YBCO plates. We measured the trapped magnetic-field distribution of the YBCO plates that will be installed in the stator by using Hall probes at 77 K after having been cooled in the presence of 1.5 T. The peak field values ranged from 0.82 to 0.87 T. The field distribution suggested that the YBCO plates were almost single domain. We also measured the repulsive force between the YBCO bulk at 77 K and a permanent magnet with the magnetic surface induction of 0.37 T. The repulsive force was about 50 N at 1.5 mm gap.

Original languageEnglish
Pages (from-to)723-728
Number of pages6
JournalPhysica C: Superconductivity and its Applications
Volume392-396
Issue numberPART 1
DOIs
Publication statusPublished - 2003 Oct
Externally publishedYes

Fingerprint

flywheels
Flywheels
stators
Stators
Superconducting materials
trapped magnetic fields
magnetic bearings
Magnetic bearings
Engine cylinders
permanent magnets
Permanent magnets
induction
modules
Magnetic fields
probes

Keywords

  • Repulsive force
  • Superconducting magnetic bearing
  • Trapped magnetic-field
  • YBCO bulk superconductor

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Characterization of YBCO bulk superconductors for 100 kW h flywheel. / Matsunaga, K.; Yamachi, N.; Tomita, M.; Murakami, Masato; Koshizuka, N.

In: Physica C: Superconductivity and its Applications, Vol. 392-396, No. PART 1, 10.2003, p. 723-728.

Research output: Contribution to journalArticle

Matsunaga, K. ; Yamachi, N. ; Tomita, M. ; Murakami, Masato ; Koshizuka, N. / Characterization of YBCO bulk superconductors for 100 kW h flywheel. In: Physica C: Superconductivity and its Applications. 2003 ; Vol. 392-396, No. PART 1. pp. 723-728.
@article{f7e69446d28a459da2c28860c75b329f,
title = "Characterization of YBCO bulk superconductors for 100 kW h flywheel",
abstract = "We characterized YBCO bulk superconductors that will be installed in the radial type superconducting magnetic bearing module for a 100 kWh class flywheel system. The inner-stator is a cylinder with the outer diameter of 208 mm, the inner diameter of 180 mm, and the height of 100 mm. At present the stator is planned to consist of 24 and 16 YBCO plates. We measured the trapped magnetic-field distribution of the YBCO plates that will be installed in the stator by using Hall probes at 77 K after having been cooled in the presence of 1.5 T. The peak field values ranged from 0.82 to 0.87 T. The field distribution suggested that the YBCO plates were almost single domain. We also measured the repulsive force between the YBCO bulk at 77 K and a permanent magnet with the magnetic surface induction of 0.37 T. The repulsive force was about 50 N at 1.5 mm gap.",
keywords = "Repulsive force, Superconducting magnetic bearing, Trapped magnetic-field, YBCO bulk superconductor",
author = "K. Matsunaga and N. Yamachi and M. Tomita and Masato Murakami and N. Koshizuka",
year = "2003",
month = "10",
doi = "10.1016/S0921-4534(03)01014-1",
language = "English",
volume = "392-396",
pages = "723--728",
journal = "Physica C: Superconductivity and its Applications",
issn = "0921-4534",
publisher = "Elsevier",
number = "PART 1",

}

TY - JOUR

T1 - Characterization of YBCO bulk superconductors for 100 kW h flywheel

AU - Matsunaga, K.

AU - Yamachi, N.

AU - Tomita, M.

AU - Murakami, Masato

AU - Koshizuka, N.

PY - 2003/10

Y1 - 2003/10

N2 - We characterized YBCO bulk superconductors that will be installed in the radial type superconducting magnetic bearing module for a 100 kWh class flywheel system. The inner-stator is a cylinder with the outer diameter of 208 mm, the inner diameter of 180 mm, and the height of 100 mm. At present the stator is planned to consist of 24 and 16 YBCO plates. We measured the trapped magnetic-field distribution of the YBCO plates that will be installed in the stator by using Hall probes at 77 K after having been cooled in the presence of 1.5 T. The peak field values ranged from 0.82 to 0.87 T. The field distribution suggested that the YBCO plates were almost single domain. We also measured the repulsive force between the YBCO bulk at 77 K and a permanent magnet with the magnetic surface induction of 0.37 T. The repulsive force was about 50 N at 1.5 mm gap.

AB - We characterized YBCO bulk superconductors that will be installed in the radial type superconducting magnetic bearing module for a 100 kWh class flywheel system. The inner-stator is a cylinder with the outer diameter of 208 mm, the inner diameter of 180 mm, and the height of 100 mm. At present the stator is planned to consist of 24 and 16 YBCO plates. We measured the trapped magnetic-field distribution of the YBCO plates that will be installed in the stator by using Hall probes at 77 K after having been cooled in the presence of 1.5 T. The peak field values ranged from 0.82 to 0.87 T. The field distribution suggested that the YBCO plates were almost single domain. We also measured the repulsive force between the YBCO bulk at 77 K and a permanent magnet with the magnetic surface induction of 0.37 T. The repulsive force was about 50 N at 1.5 mm gap.

KW - Repulsive force

KW - Superconducting magnetic bearing

KW - Trapped magnetic-field

KW - YBCO bulk superconductor

UR - http://www.scopus.com/inward/record.url?scp=0042691309&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0042691309&partnerID=8YFLogxK

U2 - 10.1016/S0921-4534(03)01014-1

DO - 10.1016/S0921-4534(03)01014-1

M3 - Article

VL - 392-396

SP - 723

EP - 728

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

SN - 0921-4534

IS - PART 1

ER -